From owner-freebsd-current Fri Feb 25 13:40:54 2000 Delivered-To: freebsd-current@freebsd.org Received: from gndrsh.dnsmgr.net (GndRsh.dnsmgr.net [198.145.92.4]) by hub.freebsd.org (Postfix) with ESMTP id 4F4F437BCF0 for ; Fri, 25 Feb 2000 13:40:49 -0800 (PST) (envelope-from freebsd@gndrsh.dnsmgr.net) Received: (from freebsd@localhost) by gndrsh.dnsmgr.net (8.9.3/8.9.3) id NAA71447; Fri, 25 Feb 2000 13:40:09 -0800 (PST) (envelope-from freebsd) From: "Rodney W. Grimes" Message-Id: <200002252140.NAA71447@gndrsh.dnsmgr.net> Subject: Re: dc0 wierdness with Compex Freedomline In-Reply-To: <200002251921.OAA31520@khavrinen.lcs.mit.edu> from Garrett Wollman at "Feb 25, 2000 02:21:15 pm" To: wollman@khavrinen.lcs.mit.edu (Garrett Wollman) Date: Fri, 25 Feb 2000 13:40:09 -0800 (PST) Cc: cwasser@v-wave.com (Chris Wasser), freebsd-current@FreeBSD.ORG X-Mailer: ELM [version 2.4ME+ PL54 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > < said: > > >> The maximum for full-duplex is utterly irrelevant, since the bounds on > >> performance for half-duplex Ethernet networks come from CSMA/CD. > > > I will say it one last time, duplex falls out of the equations when you > > solve for ``maximal''. > > Nonsense. Either stop saying that or put up the formula's like I did that show that duplex enters into the L2 maximal data rate. > > It has 0 meaning in the numbers used. Go read > > my analysis and tell me why I can't pump 12MB/sec on 100BaseTX, > > By no means -- you certainly can do that, if you have only one station > sending at a time. Of course, a monologue is by definition not useful > communication. You have a very twisted definition of communication. > > You keep throwing P(coll) in, P(coll) only occurs if your upper layer is > > causing P(coll) by doing things like ack packets. > > I'd certainly like to see a demonstration of your network using ESP > for reliability. Have you ever calculated the BER of a controlled CSMA/CD network? It is something like 10^-9. I could show you 4 working implementations of this, but I would have to call the boys in grey coats afterwards. -- Rod Grimes - KD7CAX @ CN85sl - (RWG25) rgrimes@gndrsh.dnsmgr.net To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message